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Editorial Team
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Asked: 2026-05-31T09:52:43+00:00

In GNU Make you have a list of numbers: NUMBERS = 8 9 10

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In GNU Make you have a list of numbers:

NUMBERS = 8 9 10

How can you pad them with leading zeroes?

NUMBERS = 08 09 10
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1 Answer

  1. Editorial Team

    Seems that the Make (at least GNU Make) does not have functions to deal well with this type of data. You can go wild and use the shell (only on unixes):

    NUMBERS = 8 9 10
NUMBERS2=$(foreach v,$(NUMBERS),$(shell printf '%02d' $(v)))
all:
    echo $(NUMBERS2)

    Will print:

    08 09 10
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